(Note: This post assumes you have a legitimate source/distribution and valid licensing for Windows Server 2019.)
DISM /online /Set-Edition:ServerDatacenter /ProductKey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX /AcceptEula en-windows-server-2019-x64-dvd-4cb967d8
When installing from this ISO, you will generally be asked to choose between two main editions, which differ primarily in virtualization rights and software-defined datacenter features: (Note: This post assumes you have a legitimate
: Ensure the file name matches en-windows-server-2019-x64-dvd-4cb967d8.iso to guarantee you have the official Microsoft image. en-windows-server-2019-x64-dvd-4cb967d8